Vocabulary
Velocity
Motion
Random
Acceleration
100
The rate at which velocity changes is called the ________
Acceleration
100

Velocity equals distance divided by _______

Time

100
When you know both the speed and direction of an object's motion, you know the ________
velocity
100

A car is traveling 45 km/hr down the highway and goes around a curve. Has it accelerated and how do you know?

Yes, because there was a change in direction.
100

What does it mean for an object to have a  negative acceleration?

Deceleration/ slowing down

200
What is the speed of an object at one instant in time?
Instantaneous speed
200
If you know a car traveled 300 kilometers in 3 hours, you can find its __________
Average speed, 100 km/h
200

A driver travels at 45 mph for 10 minutes.  What type of speed is this?

Constant Speed

200
If two lines appear on the same distance-versus-time graph, the line with the steeper _____________ indicates a greater speed
Slope
200

If a velocity-time graph shows a horizontal line, what does that tell you about the acceleration of the object?

Acceleration = 0

300
What is a place or or object used for comparison to determine if an object is in motion?
Reference point
300

A snail can move approximately 0.30 meters per minute. How many meters can the snail cover in 15 minutes?

4.5 meters

300

A dog is sitting beside a birdhouse when a man looks out his window.  He looks out of the window again ten minutes later, and the dog is now beside a tree on the other side of his yard. What is the reference point in this situation?

birdhouse

300

***DOUBLE JEOPARDY***

Can an object travel a long distance but have zero displacement? If so, how?

yes, if it returns to its starting point.

300
A baseball pitcher stands on the mound with a baseball in his hand. He winds up, and throws the ball to the catcher. The ball traveled at 94mph and took .75 seconds to reach the catcher. What was the acceleration of the baseball?
94mph - 0mph / .75 sec = 125.33 mph/sec^2
400
What is the SI unit for acceleration?
m/s^2
400

Calculate the average speed (in km/h) of a car stuck in traffic that drives 12 kilometers in 2 hours.

6 km/hr

400

On a graph showing distance-versus-time, a horizontal line represents an object that is __________

not moving/ speed=0

400
What is the average speed of a car that travels 400 kilometers in 8 hours?
50 km/h
400

A train slows down from 20 m/s to a complete stop in 120 seconds. What is its acceleration?

-.167 m/s^2

500
What is the state in which one object's distance from another is changing?
Motion
500

How much time would it take for the sound of thunder to travel 1,500 meters if sound travels at a speed of 330 m/sec?

4.54 sec

500
A roller coaster is moving at 10m/s at the top of a hill and 22m/s at the bottom of the hill two seconds later. What is the acceleration of the roller coaster?
22m/s - 10m/s / 2seconds = 12m/s / 2seconds = 6m/s^2
500

If you walk 100m to school and then back the same way 50m to a coffee shop, what was your distance and displacement?

Distance= 150m

Displacement= 50m

500

 A car initially traveling at 30 m/s slows to 10 m/s under a uniform acceleration of -5.0 m/s2 to avoid rear-ending another car. How long does it take the car to slow down?

4 seconds

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